20928640

素因数分解:

$2^7\times 5^1\times {\mathrm{53}}^1\times {\mathrm{617}}^1$

素因数の和:689

約数の個数: 64

約数和(自身を含む): 51059160

約数和(自身を除く): 30130520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 128, 160, 212, 265, 320, 424, 530, 617, 640, 848, 1060, 1234, 1696, 2120, 2468, 3085, 3392, 4240, 4936, 6170, 6784, 8480, 9872, 12340, 16960, 19744, 24680, 32701, 33920, 39488, 49360, 65402, 78976, 98720, 130804, 163505, 197440, 261608, 327010, 394880, 523216, 654020, 1046432, 1308040, 2092864, 2616080, 4185728, 5232160, 10464320, 20928640]

約数ペア:

[(1, 20928640), (2, 10464320), (4, 5232160), (5, 4185728), (8, 2616080), (10, 2092864), (16, 1308040), (20, 1046432), (32, 654020), (40, 523216), (53, 394880), (64, 327010), (80, 261608), (106, 197440), (128, 163505), (160, 130804), (212, 98720), (265, 78976), (320, 65402), (424, 49360), (530, 39488), (617, 33920), (640, 32701), (848, 24680), (1060, 19744), (1234, 16960), (1696, 12340), (2120, 9872), (2468, 8480), (3085, 6784), (3392, 6170), (4240, 4936)]